package com.victor.config;

import java.util.concurrent.ThreadPoolExecutor;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
//spring依赖包
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

@Configuration
public class GlobalConfig {

	/**
	 * 默认线程池线程池
	 *
	 * @return Executor
	 */
	@Bean
	public ThreadPoolTaskExecutor defaultThreadPool() {
		ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
		// 核心线程数目
		executor.setCorePoolSize(16);
		// 指定最大线程数
		executor.setMaxPoolSize(64);
		// 队列中最大的数目
		executor.setQueueCapacity(16);
		// 线程名称前缀
		executor.setThreadNamePrefix("defaultThreadPool_");
		// rejection-policy：当pool已经达到max size的时候，如何处理新任务
		// CALLER_RUNS：不在新线程中执行任务，而是由调用者所在的线程来执行
		// 对拒绝task的处理策略
		executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
		// 线程空闲后的最大存活时间
		executor.setKeepAliveSeconds(60);
		// 加载
		executor.initialize();
		return executor;
	}
}
